Even greater performance and exclusive equipment: Porsche is expanding its mid-engine range with the new two-seater 718 Boxster GTS and 718 Cayman GTS. 718 Boxster GTS: Fuel consumption combined 9.0 – 8.2 l/100 km; CO2 emissions 205 – 186 g/km 718 Cayman GTS: Fuel consumption combined 9.0 – 8.2 l/100 km; CO2 emissions 205 – 186 g/km